US2259350A - Latex and shellac coating - Google Patents

Latex and shellac coating Download PDF

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Publication number
US2259350A
US2259350A US327049A US32704940A US2259350A US 2259350 A US2259350 A US 2259350A US 327049 A US327049 A US 327049A US 32704940 A US32704940 A US 32704940A US 2259350 A US2259350 A US 2259350A
Authority
US
United States
Prior art keywords
latex
shellac
coating
rubber
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US327049A
Inventor
James A Merrill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wingfoot Corp
Original Assignee
Wingfoot Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wingfoot Corp filed Critical Wingfoot Corp
Priority to US327049A priority Critical patent/US2259350A/en
Application granted granted Critical
Publication of US2259350A publication Critical patent/US2259350A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D107/00—Coating compositions based on natural rubber
    • C09D107/02—Latex
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S524/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S524/925—Natural rubber compositions having nonreactive materials, i.e. NRM, other than: carbon, silicon dioxide, glass titanium dioxide, water, hydrocarbon or halohydrocarbon
    • Y10S524/926—Natural rubber compositions having nonreactive materials, i.e. NRM, other than: carbon, silicon dioxide, glass titanium dioxide, water, hydrocarbon or halohydrocarbon with water as NRM, exemplified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31707—Next to natural rubber
    • Y10T428/3171—With natural rubber next to second layer of natural rubber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31826—Of natural rubber
    • Y10T428/3183—Next to second layer of natural rubber

Definitions

  • Latex alone does not form a good bond with steel,-etc. nor is the bond formed with wood, concrete, etc. altogether satisfactory. According to this invention, such difficulties are overcome by mixing shellac with the latex and where a latex surface is desired, the latex-shellac composition first applied is later coated with latex containing no shellac.
  • the invention will be further described in connection with the coating of steel which is a preferred form of the invention.
  • a sheet of steel is first cleaned to remove dirt, grease, and rust spots, etc. It is then first coated with a latex-shellac composition and eventually with latex containing no shellac. Intermediate layers of latex containing shellac may beapplied, the amount of shellac being less with each layer applied.
  • the latex is applied by spraying or dipping, or in any other suitable manner.
  • Shellac is brought into solution in water by soaking, preferably in hot water, and adding ammonia or other alkaline material with stirring unitl a clear solution results.
  • the amount of shellac present may vary toa considerable degree; for example, it may be as low as twenty per cent or as high as eighty or ninety per cent or somewhat higher. All percentages referred to herein are based on the total weight of the shellac (not the alkaline salt) and the rubber present in the latex suspension. Mixtures containing twenty, forty, sixty, and eighty per cent of rubber have proven satisfactory.
  • a cleaned sheet of steel was first sprayed with a mixture of the alkaline salt of shellac and latex containing twenty per cent of rubber. It was then sprayed witha mixture containing forty per cent of rubber and then with a mixture bonded to it.
  • Typical coatings for such a process are:
  • Steel with-an adjacent coating comprising a mixture of rubber from latex and the sodium salt of shellac and an outside coating of rubber from latex which is free from shellac.
  • the method of coating steel which comprises applying thereto at least one layer of latex admixed with an alkaline salt of shellac and then coating the resulting product with latex and then drying all the coatings.
  • the method of coating steel which comprises applying thereto an admixture of latex and an alkaline salt of shellac, then applying an admixture of latex and an alkaline salt of shellac which contains a smaller proportion of shellac than the first mentioned coating, and thereafter applying a vulcanizable latex composition.
  • Metal with an adjacent coating comprising a mixture of rubber from latex and an alkaline salt of shellac and an outer coating of rubber from latex and an intermediate coating'comprising a mixture of rubber from latex and an alkaline salt of shellac, the shellac in said last mentioned coating being present in smaller amount than in the coating next to the metal.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

, Patented Oct. 14, 1941' UNITED STATES PATENT OFFICE I 2,259,350 LATEX AND SHELLAC COATING James A. Merrill, Barberton, Ohio, assigno'r to Wingfoot Corporation, Wilmington, Del., a corporation of Delaware No Drawing. Application March 30, 1940,
Serial N0. 327,049
7 Claims.
mented and contain fillers, etc. to give a coating I of desired properties..
Considerable difliculty has been experienced in attempting to coat metals, etc. with rubber. Latex alone does not form a good bond with steel,-etc. nor is the bond formed with wood, concrete, etc. altogether satisfactory. According to this invention, such difficulties are overcome by mixing shellac with the latex and where a latex surface is desired, the latex-shellac composition first applied is later coated with latex containing no shellac. The invention will be further described in connection with the coating of steel which is a preferred form of the invention.
A sheet of steel is first cleaned to remove dirt, grease, and rust spots, etc. It is then first coated with a latex-shellac composition and eventually with latex containing no shellac. Intermediate layers of latex containing shellac may beapplied, the amount of shellac being less with each layer applied. The latex is applied by spraying or dipping, or in any other suitable manner.
The following procedure is illustrative of the invention:
Shellac is brought into solution in water by soaking, preferably in hot water, and adding ammonia or other alkaline material with stirring unitl a clear solution results. The amount of shellac present may vary toa considerable degree; for example, it may be as low as twenty per cent or as high as eighty or ninety per cent or somewhat higher. All percentages referred to herein are based on the total weight of the shellac (not the alkaline salt) and the rubber present in the latex suspension. Mixtures containing twenty, forty, sixty, and eighty per cent of rubber have proven satisfactory.
A cleaned sheet of steel was first sprayed with a mixture of the alkaline salt of shellac and latex containing twenty per cent of rubber. It was then sprayed witha mixture containing forty per cent of rubber and then with a mixture bonded to it. Typical coatings for such a process are:
Wet Dry weight weight First coating: Parts Parts 60% late! 67 40 20% shellac 300 60 Third coating:
60% latex 133 80 20% shellac 100 20 Fourth coating:
containing eighty per cent of rubber. Two coats of latex containing no shellac were then sprayed onto the latex-shellac base. The whole was then dried. The resulting coating on the metal was about V of an inch thick and was securely salt of shellac, and an outer coating of rubber from latex which is free from shellac.
2. Steel with-an adjacent coating comprising a mixture of rubber from latex and the sodium salt of shellac and an outside coating of rubber from latex which is free from shellac.
3. The method of coating steel which comprises applying thereto at least one layer of latex admixed with an alkaline salt of shellac and then coating the resulting product with latex and then drying all the coatings.
4. The method of coating steel which comprises applying thereto an admixture of latex and an alkaline salt of shellac, then applying an admixture of latex and an alkaline salt of shellac which contains a smaller proportion of shellac than the first mentioned coating, and thereafter applying a vulcanizable latex composition.
5. Metal with an adjacent coating comprising a mixture of rubber from latex and an alkaline salt of shellac and an outer coating of rubber from latex and an intermediate coating'comprising a mixture of rubber from latex and an alkaline salt of shellac, the shellac in said last mentioned coating being present in smaller amount than in the coating next to the metal.
6. Steel with an adjacent coating comprising a
US327049A 1940-03-30 1940-03-30 Latex and shellac coating Expired - Lifetime US2259350A (en)

Priority Applications (1)

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US327049A US2259350A (en) 1940-03-30 1940-03-30 Latex and shellac coating

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US327049A US2259350A (en) 1940-03-30 1940-03-30 Latex and shellac coating

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US2259350A true US2259350A (en) 1941-10-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484705A (en) * 1945-09-25 1949-10-11 Western Electric Co Method of improving the adherence of insulating compounds to metals and products resulting thereform
US2567317A (en) * 1947-09-26 1951-09-11 Bonniel Jean Method of manufacturing latex articles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484705A (en) * 1945-09-25 1949-10-11 Western Electric Co Method of improving the adherence of insulating compounds to metals and products resulting thereform
US2567317A (en) * 1947-09-26 1951-09-11 Bonniel Jean Method of manufacturing latex articles

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